diff --git a/Makefile.android b/Makefile.android
index 0441652..817c562 100644
--- a/Makefile.android
+++ b/Makefile.android
@@ -84,18 +84,18 @@
     endif
     ifneq ($(filter 10.5 10.5.% 10.6 10.6.%,$(DARWIN_VERSION)),)
         # We are on Leopard or Snow Leopard
-        MSDK=10.5
+        OSX_VERSION=10.5
     else
         # We are on Lion or beyond, and 10.6 SDK is the minimum in Xcode 4.x
-        MSDK=10.6
+        OSX_VERSION=10.6
     endif
-    MACOSX_SDK := /Developer/SDKs/MacOSX$(MSDK).sdk
+    MACOSX_SDK := /Developer/SDKs/MacOSX$(OSX_VERSION).sdk
     ifeq ($(strip $(wildcard $(MACOSX_SDK))),)
-        $(info  Please install the $(MSDK) SDK on this machine at $(MACOSX_SDK))
+        $(info  Please install the $(OSX_VERSION) SDK on this machine at $(MACOSX_SDK))
         $(error Aborting the build.)
     endif
-    MY_CFLAGS += -isysroot $(MACOSX_SDK) -mmacosx-version-min=$(MSDK) -DMACOSX_DEPLOYMENT_TARGET=$(MSDK)
-    MY_LDLIBS += -isysroot $(MACOSX_SDK) -Wl,-syslibroot,$(MACOSX_SDK) -mmacosx-version-min=$(MSDK)
+    MY_CFLAGS += -isysroot $(MACOSX_SDK) -mmacosx-version-min=$(OSX_VERSION) -DMACOSX_DEPLOYMENT_TARGET=$(OSX_VERSION)
+    MY_LDLIBS += -isysroot $(MACOSX_SDK) -Wl,-syslibroot,$(MACOSX_SDK) -mmacosx-version-min=$(OSX_VERSION)
 endif
 
 # BUILD_STANDALONE_EMULATOR is only defined when building with
diff --git a/Makefile.common b/Makefile.common
index 51fcb85..233be48 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -139,11 +139,10 @@
 $(call end-emulator-library)
 
 ## another for 64-bit
-# NOTE: only linux in non-standalone mode is supported, because
+# NOTE: only linux and darwin in non-standalone mode is supported, because
 #  1) For Windows: amd64-mingw32msvc-gcc doesn't work, see http://b/issue?id=5949152.
-#  2) For MacOSX: 64-bit libSDL*.a 1.2.x depends on NSQuickDrawView doesn't exist
-#  3) Standalone has --try-64
-ifeq ($(HOST_OS),linux)
+#  2) Standalone has --try-64
+ifneq ($(filter linux darwin,$(HOST_OS)),)
   ifneq ($(BUILD_STANDALONE_EMULATOR),true)
     $(call start-emulator-library, emulator64-common)
     LOCAL_CFLAGS += $(common_LOCAL_CFLAGS) -m64
@@ -151,7 +150,7 @@
     $(call gen-hw-config-defs)
     $(call end-emulator-library)
   endif # BUILD_STANDALONE_EMULATOR == nil
-endif # HOST_OS == linux
+endif # HOST_OS == linux || darwin
 
 ##############################################################################
 ##############################################################################
@@ -288,7 +287,7 @@
 
 
 ## another for 64-bit, see note in emulator64-common
-ifeq ($(HOST_OS),linux)
+ifneq ($(filter linux darwin,$(HOST_OS)),)
   ifneq ($(BUILD_STANDALONE_EMULATOR),true)
     $(call start-emulator-library, emulator64-libui)
     LOCAL_CFLAGS += $(common_LOCAL_CFLAGS) -m64
@@ -296,7 +295,7 @@
     $(call gen-hw-config-defs)
     $(call end-emulator-library)
   endif # BUILD_STANDALONE_EMULATOR == nil
-endif # HOST_OS == linux
+endif # HOST_OS == linux || darwin
 
 
 ##############################################################################
@@ -612,7 +611,7 @@
 
 
 ## another for 64-bit, see note in emulator64-common
-ifeq ($(HOST_OS),linux)
+ifneq ($(filter linux darwin,$(HOST_OS)),)
   ifneq ($(BUILD_STANDALONE_EMULATOR),true)
     $(call start-emulator-library, emulator64-libqemu)
     # gdbstub-xml.c contains C-compilable arrays corresponding to the content
@@ -632,7 +631,7 @@
     $(call gen-hw-config-defs)
     $(call end-emulator-library)
   endif # BUILD_STANDALONE_EMULATOR == nil
-endif # HOST_OS == linux
+endif # HOST_OS == linux || darwin
 
 
 # Block sources, we must compile them with each executable because they
@@ -706,7 +705,7 @@
 
 
 ## another for 64-bit, see note in emulator64-common
-ifeq ($(HOST_OS),linux)
+ifneq ($(filter linux darwin,$(HOST_OS)),)
   ifneq ($(BUILD_STANDALONE_EMULATOR),true)
     $(call start-emulator-library, emulator64-libelff)
     LOCAL_CPP_EXTENSION := .cc
@@ -714,7 +713,7 @@
     LOCAL_SRC_FILES += $(common_LOCAL_SRC_FILES)
     $(call end-emulator-library)
   endif # BUILD_STANDALONE_EMULATOR == nil
-endif # HOST_OS == linux
+endif # HOST_OS == linux || darwin
 
 
 ##############################################################################
diff --git a/Makefile.target b/Makefile.target
index 608761c..dcf9a80 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -281,7 +281,7 @@
 $(call end-emulator-library)
 
 ## another for 64-bit, see note in file Makefile.common emulator64-common
-ifeq ($(HOST_OS),linux)
+ifneq ($(filter linux darwin,$(HOST_OS)),)
   ifneq ($(BUILD_STANDALONE_EMULATOR),true)
     $(call start-emulator-library, emulator64-target-$(EMULATOR_TARGET_CPU))
     LOCAL_CFLAGS += $(common_LOCAL_CFLAGS) -m64
@@ -290,7 +290,7 @@
     $(call gen-hx-header,qemu-options.hx,qemu-options.def,os-posix.c os-win32.c)
     $(call end-emulator-library)
   endif # BUILD_STANDALONE_EMULATOR == nil
-endif # HOST_OS == linux
+endif # HOST_OS == linux || darwin
 
 
 
@@ -475,7 +475,7 @@
 
 
 ## another for 64-bit, see note in file Makefile.common emulator64-common
-ifeq ($(HOST_OS),linux)
+ifneq ($(filter linux darwin,$(HOST_OS)),)
   ifneq ($(BUILD_STANDALONE_EMULATOR),true)
     $(call start-emulator-program, emulator64-$(EMULATOR_TARGET_ARCH))
     LOCAL_STATIC_LIBRARIES += \
@@ -493,5 +493,5 @@
     $(call gen-hw-config-defs)
     $(call end-emulator-program)
   endif # BUILD_STANDALONE_EMULATOR == nil
-endif # HOST_OS == linux
+endif # HOST_OS == linux || darwin